KL company have 5 kinds of compressed air filter for your choose:
CLASS C Main pipe dust filter ----3micron3ppm
CLASS T Main pipe oil/water filter ----1micron1ppm
CLASS A High efficient oil filter ----0.01micron0.01ppm
CLASS F Supper high efficient oil filter----0.01micron0.001ppm
CLASS H Activated carbon micro oil moisture filter----0.01micron0.003ppm